Yo-Kai Watch began as a video game released in Japan in 2013, and later became an anime series. In the series, humans use a special watch to befriend and summon Yo-kai, invisible spirits inspired by Japanese folklore, and each Yo-kai belongs to one of several tribes. The summoning music became closely linked to that moment of calling a new ally. As clips and gameplay spread online, fans began reusing the short jingle outside the game, and its bright, familiar sound still works as shorthand for a magical arrival.